Power transmitting belt



June 27, 1933. k P. L. GARDERE 3 5 1 PQYQ'ER TRANSMITTING BELT FiledSept. 9. 1927 w rill * siren PIER-BE LEONGE GABDERE, OF BORDEAUX, FRANCEFOVIEE TRANSMITTING BELT Application filed September 9, 1927, fierialNo. 218,552, and in France September 20, 1926.

The invention will be clearly understood with reference to theappendeddrawing, which shows, by way of example, various embodiments of theinvention.

Fig. 1 shows a belt according to vention. I V

Fig. 9. is a section on the line B-B of Fig. 1.

Fig. 3 shows a modification in which the desigii formed by the lacingcomprises a row of chevrons. I 7

Figs; 4 to 8 are dia rammatic views showa. in-

:2 ing various combinations which may be obtained with inclin d linesand chevrons.

Tn the constructional. form shown inFigs. 1 and 2, the belt 1, which mayhave any suitable width and thickness and mayconsist of leather or likematerialof which belts are nsu lly manufactured, is provided with twoparallel rows of apertures 2, 2", 2*, etc, 3, 8, 3, etc, which areeither circular holes or preferably elongated slots and are equallyspaced apart. In the said holes or slots are laced continuous strips l,5, etc, of leather, hemp or any other suitable material.

The width of the strips 4 and 5 is substantially equal to the length ofthe slots 2 and 3, and the thickness is equal to or somewhat above thewidth of the said slots. The lacing is performed in the followingmanner. The strip 4 is inserted from back to front through the slot 2(Fig. 1) and then from front to back through the slot 3 then from backto front through the slot 2 and so on; the second strip 4: is laced in asimilar manner through the slots 3, 2 3 and so on.

It will be observed at the lower part of Fig. lthat the lacing of thesaid strips will form on the belt two sets of lines which are of thisrow of slots 1 form rows of slots 7 0 each slot being on the sametransverse axis as the corresponding slot 6, the width of the slots 7being practically equal to the thick- 7 ness of a strip. The figureclearly shows the" manner in which the lacing the strips 8 and 9 iseffected in this case.

Fig. l illustrates a modification of the lacing shown in Fig. 1, inwhich only a single strip 10 is utilized, and herein the spacing betweenthe lines of the design formed by the lacing is greater than in the caseof Fig. 1, assuming that the inclination of said lines upon the axis ofthe belt is the same.

Fig. 5 shows a belt comprising the combination of two lacings such asshown in Fig. 1, the design consisting of two sets of lines which areinversely inclined upon'the axis of the belt.

Fig. 6 shows the combination of the lacing shown in Fig. 1, formed atthe central part of the belt, with two sets of chevrons of the typerepresented in Fig. 3.

Fig. 7 shows a lacing which comprises two sets of chevrons whosevertices are directed in a direction and a set of chevrons at thecentral part, whose vertices have the contrary direction.

Fig. 8 is a modification of Fig. 1 in which the middle axis (re-a of thelacing of the strip 5 does not coincide with the middle axis b o of thelacing of the strip 4. In this particular case, the width and thespacing of the strips may be such that the edges of the said strips arein contact.

The arrangement of belting herein specilied offers the followingadvantages:

Due to the inclined disposition of the lacing with respect to the beltaxis, the belt will adhere more strongly to the pulleys, and theslipping of the belt will thus be reduced. The adherence to the pulleywill be uniform throughout the width of the belt. Moreover, the beltwill have no back side and either face may be mounted in contact withthe pulleys the thickness of the strips, which is comparatively small,whereas the width of the apertures in the known belts, provided-withlacings extending longitudinally, must be substantially equal to thewidth of the strips.

By the use of a lacing which forms a design consisting of lines whichare inversely inclined, the belt will have a tendency to remain in theproper direction of motion. Obviously, the constructional forms shown inthe drawing are susceptible of numerous modifications without departingfrom the principle of the invention. For instance, I may superpose andconnect together acertain number of belts of the kind described, r maycombine a belt of this kind with an ordinary smooth belt.

: Having now described my invention, what I claim as new and desire tosecure by Letters Patent is: Q

1. A power transmitting belt comprising a tension resisting core piercedwith apertures disposedin at least two longitudinal rows, saidaperturesbeing symmetrically disposed with respect to the axis of thatpart of the belt com rised between said two longitudinal rows an atleast two strips of yielding material laced entirely around the beltthrough said apertures, the lacing beingperformed by continuouslywinding in an helical manner and in the same direction, each of saidstrips 40 y w r the grain-side isat the exterior throughout the belt andon both sides thereof.

2. A power transmitting belt of the type comprising a tension resistingcore having at least two longitudinal rows of apertures and at least onestrip of yielding material laced entirely around the belt through saidapertures, whereinthe core is made of a single strap and the stripcoiled around the longitudinal portion of core located between said rowsof apertures bybeing alternately passed from one row to the other andthen back to the first, so that the same face of the strip, either theflesh side or the grain-side is at the exterior throughout the belt andon both sides thereof.

3. A power transmitting belt comprising a tension resisting core havingat least three longitudinal rows of apertures, the width of theapertures of the median row being equal to the sum of the widths of thesidelong apertures, at least two strips of yielding material lacedentirely around the belt through said apertures, one of said stripsoeing wound in an helical manner around the longitudinal portion of corelimited by the median row and one sidelong row, and the other woundaround the other longitudinal portion defined by the mediairrow and theother sidelong PIERRE LEoNoE GARDERE.

